package A;

class Ba {
    public Ba(int a){
        System.out.println("b");
    }
    public Ba(){
        System.out.println("B");
    }
}
public class Aa extends Ba {
    public Aa(){
        System.out.println("a");
    }
    public Aa(int a){
        System.out.println("A");
    }
    public static void main(String[] args) {
//        Aa a=new Aa(1);
//        Ba b=new Aa();


        int m=0;
        String str="a";
        for(int i=0;i<str.length();i++){
            m|=1<<(str.charAt(i)-'a');
        }
        System.out.println(m);
        System.out.println(1<<0);
    }
}

